If you haven’t seen it yet, NASA released this amazing image yesterday of a large avalanche on the Red Planet taken by the Mars Reconnaissance Orbiter back on February 19. It was recorded by chance as the Orbiter was snapping pictures of Mars’ north polar cap. The slope at left running top to bottom is some 2,300 feet high. The avalanche created a large cloud of debris that extends about 590 feet across. The material contains fine grained ice and dust and perhaps some larger boulders that tumbled from the cliffs before settling on the slopes below.
For more photos, you can go to: http://hirise.lpl.arizona.edu/PSP_007338_2640